Keystone® Standard I

The Keystone Standard unit is an American original. The product that started the industry is still the industry leader for tall walls and critical structures. The height-to-depth ratio of the Keystone Standard unit delivers a structurally sound, engineered wall system with superior construction stability, durability and strength. This larger-depth block allows taller gravity walls (typically up to 4-5 feet, depending on loading conditions and soils), and is PennDOT Bulletin 15 approved.

Note: This product is available by special order only. Our Standard III is stocked in all colors.